1. 软件相关请求未放行

在浏览器上登录软件，通过“F12”按钮打开网络请求界面，将“shanhaibi”相关请求放行。

2. 没有按照要求配置代理

检查网络代理配置信息，配置参考：

map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
}

# 代理单个大屏
server {
    listen 8081;

    location /socket.io/ {
        proxy_cache off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_pass http://127.0.0.1:10000/socket.io/;
    }
    
    location /bi/ {
        proxy_cache off;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_pass http://127.0.0.1:10000/ku0uz0y5w4vu/;
    }
}

# 代理整个 Web 服务器
server {
    listen 80;

    location /aaa/ {
        root   html;
        index  /index.html;
    }

    location /socket.io/ {
        proxy_cache off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_pass http://127.0.0.1:10000/socket.io/;
    }
    
    location /shanhaibi/ {
        proxy_cache off;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_pass http://127.0.0.1:10000/;
    }
}